2098 Aluminum alloy,Aluminum 2098 alloy,E FORU

### **Product Datasheet: 2098 Aluminum Alloy** --- #### **1. Overview** 2098 Aluminum Alloy is a third-generation aluminum-lithium (Al-Cu-Li) alloy designed for superior damage tolerance and excellent strength-to-weight ratio in aerospace applications. This advanced alloy represents significant improvements over previous generations, offering enhanced corrosion resistance, reduced anisotropy, and improved thermal stability. 2098 is particularly suitable for applications requiring a balanced combination of high strength, good fracture toughness, and weight savings, making it ideal for next-generation aircraft structures. --- #### **2. International Standards** - **UNS**: UNS A92098 - **ASTM**: ASTM B209 (Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate) - **AMS**: AMS 4412 (Aerospace Material Specification) - **AA (Aluminum Association)**: AA 2098 - **ISO**: ISO 6361-2 (Wrought Aluminum and Aluminum Alloy Sheet, Strip and Plate) --- #### **3. Chemical Composition (Weight %)** | Element | Content (%) | |---------|-------------| | **Aluminum (Al)** | Balance | | **Copper (Cu)** | 3.2–3.8 | | **Lithium (Li)** | 0.8–1.5 | | **Magnesium (Mg)** | 0.25–0.8 | | **Silver (Ag)** | 0.25–0.6 | | **Zirconium (Zr)** | 0.08–0.15 | | **Manganese (Mn)** | 0.20–0.7 | | **Zinc (Zn)** | ≤ 0.25 | | **Iron (Fe)** | ≤ 0.12 | | **Silicon (Si)** | ≤ 0.10 | | **Titanium (Ti)** | ≤ 0.10 | | **Other Elements** | ≤ 0.05 each | | **Total Others** | ≤ 0.15 | --- #### **4. Physical Properties** | Property | Value | |----------|-------| | **Density** | 2.70–2.72 g/cm³ (0.0975–0.0982 lb/in³) | | **Melting Range** | ~540–650°C (1000–1200°F) | | **Electrical Conductivity** | ~30–34 % IACS | | **Thermal Conductivity** | 95–115 W/m·K | | **Coefficient of Thermal Expansion** | 22.0–23.0 × 10⁻⁶/°C (20–100°C) | | **Modulus of Elasticity** | 77.0–79.0 GPa (11,200–11,500 ksi) | --- #### **5. Mechanical Properties (Typical Values - T8 Temper)** | Property | Typical Value | |----------|---------------| | **Tensile Strength (Ultimate)** | 530–580 MPa (77–84 ksi) | | **Tensile Yield Strength (0.2% Offset)** | 480–530 MPa (70–77 ksi) | | **Elongation at Break** | 7–11% | | **Compressive Yield Strength** | 490–540 MPa (71–78 ksi) | | **Shear Strength** | 310–350 MPa (45–51 ksi) | | **Bearing Yield Strength** | 750–820 MPa (109–119 ksi) | | **Fracture Toughness (L-T方向)** | 30–36 MPa√m | | **Fatigue Strength** | 160–190 MPa (10⁷ cycles) | --- #### **6. Key Characteristics & Advantages** - **Optimized Damage Tolerance**: Excellent balance of strength and fracture toughness - **Weight Reduction**: 5–7% lower density than conventional aluminum alloys - **Enhanced Corrosion Resistance**: Superior to earlier aluminum-lithium alloys - **Improved Thermal Stability**: Maintains properties at elevated temperatures - **Reduced Anisotropy**: More uniform mechanical properties in different directions - **Good Fatigue Performance**: Excellent resistance to crack initiation and growth - **Manufacturing Flexibility**: Improved formability and machining characteristics --- #### **7. Product Applications** - **Aircraft Fuselage Components**: Skin panels, stringers, and frames - **Wing Structures**: Upper and lower wing skins - **Spacecraft Components**: Satellite structures and launch vehicle components - **Military Aircraft**: Fighter aircraft structural components - **Helicopter Structures**: Airframe components and rotor systems - **Commercial Aviation**: Next-generation airliner structures --- #### **8. Available Forms** - Sheet (0.8–8.0 mm thickness) - Plate (8–120 mm thickness) - Extruded Profiles and Bars - Forging Stock --- #### **9. Processing and Handling** - **Heat Treatment**: Responsive to artificial aging with good process window - **Forming Operations**: Suitable for forming in solution heat-treated condition - **Machining**: Good machinability with standard aluminum cutting tools - **Joining**: Excellent weldability with conventional and advanced methods - **Surface Protection**: Compatible with standard aerospace coating systems - **Quality Control**: Meets stringent aerospace quality requirements --- **Disclaimer**: The information presented is typical and for reference only. Actual properties may vary with processing, size, and heat treatment. For critical applications, contact our technical service team for specific data and processing recommendations.

Packing of Standard Packing: Typical bulk packaging includes palletized plastic 5 gallon/25 kg. pails, fiber and steel drums to 1 ton super sacks in full container (FCL) or truck load (T/L) quantities. Research and sample quantities and hygroscopic, oxidizing or other air sensitive materials may be packaged under argon or vacuum. Solutions are packaged in polypropylene, plastic or glass jars up to palletized 1592 gallon liquid totes Special package is available on request.